On occasion, you may need to remove stored web pages and their content. Each browser has its own cache:
Delete Browser Cache: Internet Explorer
In Internet Explorer, tap or click the Tools button and then tap or click Internet options
On the General tab, under Browsing history, click the Delete button.
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Ensure that Temporary Internet files and website files & Cookies and website data check boxes are selected, then click Delete.
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Click OK.
Close and relaunch Internet Explorer.
Delete Browser Cache: Firefox
In Firefox, open Menu>Options
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Select the Advanced panel>Network Tab and click on Clear Now
Click on the Network tab.
In the Cached Web Content section, click Clear Now.
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Close the about:preferences page. Any changes you’ve made will automatically be saved